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Internal and external noise in binaural detection.
Hearing Research
|August 1, 1983
Summary
Detecting a 500 Hz tone was harder when the computer-generated maskers were independent between trials compared to when they were identical. This finding impacts theories of binaural hearing.
Area of Science:
- Auditory Neuroscience
- Psychoacoustics
- Signal Processing
Background:
- Binaural hearing involves processing sound with two ears.
- Understanding interaural noise conditions is crucial for auditory perception models.
Purpose of the Study:
- To investigate the impact of masker independence on tone detectability.
- To evaluate the N0SII interaural condition in a masking paradigm.
Main Methods:
- Utilized a two-interval, forced-choice (2IFC) detection task.
- Employed computer-generated maskers under independent and identical masker conditions.
- Tested a 500 Hz tone signal.
Main Results:
- Detection thresholds were significantly higher with independent maskers.
- Identical maskers resulted in lower detection thresholds.
- The N0SII interaural condition was maintained throughout.
Conclusions:
- Masker independence degrades binaural tone detection.
- Results provide evidence supporting and refining the Theory of Binaural Interaction Based on Auditory Nerve Data.
- The study highlights the role of masker predictability in auditory masking.